/* Base reset and variables */
:root{
  --bg:#0b0f14;
  --bg-2:#0e131a;
  --text:#e8f0ff;
  --muted:#a3b4d6;
  --accent:#00d4ff;
  --accent-2:#6a5cff;
  --card:#0f1621;
  --border:rgba(255,255,255,0.08);
  --shadow:0 10px 30px rgba(0,0,0,.35), 0 2px 10px rgba(0,0,0,.25);
  /* Cursor glow position (updated by JS) */
  --mx: 50%;
  --my: 40%;
  --glow-opacity: .8;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,var(--bg),var(--bg-2));
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
/* Gate: hide site chrome until authenticated */
body.gate-hidden{overflow:hidden}
body.gate-hidden header,
body.gate-hidden main,
body.gate-hidden footer,
body.gate-hidden .cursor-glow,
body.gate-hidden .grid-glow{display:none !important}
/* Cursor-following glow layer */
.cursor-glow{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(320px 240px at var(--mx) var(--my), rgba(0,212,255,.16), transparent 60%),
    radial-gradient(500px 300px at calc(var(--mx) + 120px) calc(var(--my) + 80px), rgba(106,92,255,.12), transparent 65%);
  filter:blur(20px);
  opacity:var(--glow-opacity,.8);
  will-change: opacity, transform;
  transform: translateZ(0);
}
/* Grid layer only visible within the glow (masked) */
.grid-glow{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  /* Subtle animated grid */
  background:
    linear-gradient(transparent 31px, rgba(255,255,255,.10) 32px),
    linear-gradient(90deg, transparent 31px, rgba(255,255,255,.10) 32px);
  background-size:32px 32px;
  opacity:.18;
  animation: panGrid 28s linear infinite;
  /* Mask to cursor glow position */
  -webkit-mask-image: radial-gradient(320px 240px at var(--mx) var(--my), black 60%, transparent 70%);
  mask-image: radial-gradient(320px 240px at var(--mx) var(--my), black 60%, transparent 70%);
  will-change: opacity, transform;
  transform: translateZ(0);
}
@media (max-width: 680px){
  .grid-glow{
    background-size:28px 28px;
    opacity:.18;
    -webkit-mask-image: radial-gradient(240px 180px at var(--mx) var(--my), black 60%, transparent 70%);
    mask-image: radial-gradient(240px 180px at var(--mx) var(--my), black 60%, transparent 70%);
  }
}
/* Skip link for keyboard users */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:12px;width:auto;height:auto;background:#0b0f14;color:#fff;padding:8px 12px;border-radius:8px;outline:2px solid var(--accent)}

/* Focus-visible styles */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}
nav a:focus-visible,.btn:focus-visible{outline:2px solid var(--accent-2)}

/* (removed hero-shot image styles) */

/* Mobile tweaks for glow */
@media (max-width: 680px){
  .cursor-glow{
    background:
      radial-gradient(240px 180px at var(--mx) var(--my), rgba(0,212,255,.14), transparent 60%),
      radial-gradient(360px 220px at calc(var(--mx) + 80px) calc(var(--my) + 60px), rgba(106,92,255,.10), transparent 65%);
    filter:blur(16px);
  }
}
img{max-width:100%;display:block}
.container{width:min(1120px,90%);margin-inline:auto}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,15,20,.78);/* removed backdrop-filter for perf */border-bottom:1px solid var(--border);transition:transform .18s ease;will-change: transform;transform: translateZ(0)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.nav{gap:14px}
.brand{
  font-weight:800;
  letter-spacing:.3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  /* subtle radiant glow */
  filter: drop-shadow(0 0 8px rgba(0,212,255,.25));
}
.logo{
  display:inline-block;
  font-weight:800;
  letter-spacing:.4px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter: drop-shadow(0 0 8px rgba(0,212,255,.25));
}
.site-logo-img{height:28px;width:auto;display:block}
nav a{color:var(--muted);text-decoration:none;margin-left:20px;font-weight:500;transition:color .2s}
nav a:hover{color:var(--text)}

/* Language switch (top-left) */
.lang-switch{position:relative;display:flex;align-items:center}
.lang-toggle{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.06);
  color:var(--text);
  border:1px solid var(--border);
  border-radius:10px;
  padding:6px 10px;
  font:inherit;line-height:1;cursor:pointer;
}
.lang-toggle:focus-visible{outline:2px solid #00D4FF; outline-offset:2px; border-color:#00D4FF}
.lang-toggle::after{content:"";width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:6px solid var(--muted);opacity:.9}

.lang-menu{position:absolute;top:100%;left:0;margin-top:8px;min-width:160px;
  background:rgba(15,20,26,.98);border:1px solid var(--border);border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.35);
  padding:6px;list-style:none;z-index:60;will-change:transform,opacity;transform:translateY(-4px);opacity:0;transition:transform .16s ease, opacity .16s ease;
}
.lang-menu[hidden]{display:block!important;opacity:0;pointer-events:none}
.lang-switch[aria-open="true"] .lang-menu{transform:translateY(0);opacity:1}
.lang-menu li{padding:8px 10px;border-radius:8px;color:var(--text);cursor:pointer;user-select:none}
.lang-menu li{display:flex;align-items:center;gap:8px}
.lang-menu .flag{font-size:16px;line-height:1}
.lang-toggle .lang-current{display:inline-flex;align-items:center;gap:8px}
.lang-menu li[aria-selected="true"]{background:rgba(0,212,255,.12);outline:1px solid rgba(0,212,255,.25)}
.lang-menu li:hover,.lang-menu li:focus{background:rgba(255,255,255,.08)}

/* Visually hidden label for accessibility */
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Header scroll states */
.site-header.scroll-down{transform:translateY(-100%)}
.site-header.scroll-up{transform:translateY(0)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:80px 0 64px}
/* Animated neon gradient backdrop */
.gradient-bg{
  position:absolute;inset:-30% -10% auto;
  height:80vh;
  background:
    radial-gradient(800px 400px at 20% 20%, rgba(0,212,255,.25), transparent 60%),
    radial-gradient(800px 400px at 80% 10%, rgba(106,92,255,.25), transparent 60%);
  filter:blur(44px);
  opacity:.9;
  pointer-events:none;
  animation: floatBlob 24s ease-in-out infinite alternate;
  will-change: transform, filter, opacity;
  transform: translateZ(0);
}
/* Subtle animated grid overlay */
.hero::before{
  content:"";
  position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.16;
  background:
    linear-gradient(transparent 31px, rgba(255,255,255,.08) 32px),
    linear-gradient(90deg, transparent 31px, rgba(255,255,255,.08) 32px);
  background-size:32px 32px;
  animation: panGrid 28s linear infinite;
  will-change: transform, opacity;
  transform: translateZ(0);
}
.hero-inner{position:relative}
.headline{font-size:clamp(34px,6vw,64px);line-height:1.05;margin:0 0 16px;font-weight:900}
.headline .accent{display:block;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.subhead{color:var(--muted);font-size:clamp(16px,2.2vw,18px);max-width:680px;margin:0 0 28px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);color:var(--text);padding:12px 18px;border-radius:12px;text-decoration:none;font-weight:600;transition:transform .15s ease, background .2s, border-color .2s;background:transparent;appearance:none;-webkit-appearance:none}
.btn:hover{transform:translateY(-2px)}
.btn.primary{background:linear-gradient(180deg,var(--accent),#00c4ff);color:#00121a;border-color:transparent;box-shadow:0 0 0 rgba(0,212,255,0)}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn.ghost:hover{border-color:rgba(255,255,255,.18)}
.btn.primary:hover{box-shadow:0 0 24px rgba(0,212,255,.25), 0 0 8px rgba(0,212,255,.35)}
.btn.ghost{background:rgba(255,255,255,.03)}
.btn.xl{padding:16px 22px;border-radius:14px}
/* Disabled buttons (ARIA) */
.btn[aria-disabled="true"]{opacity:.55;cursor:not-allowed;pointer-events:none}

.hero-media{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  margin-top:36px
}
.card{
  background:linear-gradient(180deg,#111a27,#0b111b);
  border:1px solid var(--border);
  border-radius:16px;
  padding:12px 14px;
  box-shadow:var(--shadow);
  color:var(--muted);
  font-weight:600;
  letter-spacing:.1px
}
.card-1{
  height:72px
}
.card-2{
  height:84px
}
.card-3{
  height:80px
}

/* Features */
.features{
  padding:80px 0 60px;
  border-top:1px solid var(--border)
}
.section-title{
  font-size:clamp(24px,3.6vw,32px);
  margin:0 0 20px
}
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
  gap:20px;
  align-items:stretch
}
.feature{
  background:linear-gradient(180deg,#0e1724,#0b121c);
  border:1px solid var(--border);
  border-radius:16px;
  padding:20px;
  min-height:180px;
  box-shadow:0 6px 18px rgba(0,0,0,.32); /* lighter static shadow for perf */
  transition:border-color .2s ease;
  position:relative;overflow:hidden;
  backface-visibility:hidden;
  contain: paint;
  transform: translateZ(0);
  display:flex; flex-direction:column; justify-content:flex-start;
}
.feature .icon{
  font-size:22px;
  margin-bottom:6px
}
.feature h3{
  margin:6px 0 8px
}
.feature p{
  margin:0;
  color:var(--muted)
}
.feature p{margin:0;color:var(--muted)}

/* (controls section removed) */

/* Showcase */
.showcase{padding:84px 0 64px;border-top:1px solid var(--border)}
.showcase-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;align-items:stretch}
.tile{position:relative;display:flex;align-items:center;justify-content:center;height:110px;border-radius:16px;border:1px solid var(--border);background:linear-gradient(160deg,rgba(0,212,255,.1),rgba(106,92,255,.1));box-shadow:var(--shadow);color:var(--text);font-weight:600;letter-spacing:.1px;overflow:hidden}
.tile::after{content:"";position:absolute;inset:0;background:radial-gradient(200px 80px at 20% -20%, rgba(255,255,255,.18), transparent 60%);opacity:.8}

/* CTA */
.cta{padding:90px 0}
.cta p{color:var(--muted)}

/* Versions */
.versions{padding:84px 0 64px;border-top:1px solid var(--border)}
.version-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(300px,1fr));gap:20px;align-items:stretch}
.version-card{background:linear-gradient(180deg,#0e1724,#0b121c);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 6px 18px rgba(0,0,0,.32);position:relative;overflow:hidden;transition:border-color .2s ease;backface-visibility:hidden;contain: paint;transform: translateZ(0);display:flex;flex-direction:column;gap:14px}
.version-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}
.version-header h3{margin:0}
.pill{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid var(--border);color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.3px;text-transform:uppercase}
.pill.accent{background:linear-gradient(180deg,rgba(0,212,255,.15),rgba(106,92,255,.15));color:var(--text)}
.platforms{display:grid;grid-template-columns:repeat(auto-fit, minmax(240px,1fr));gap:14px;align-items:stretch}
.platform{background:linear-gradient(180deg,#0f1621,#0b111b);border:1px solid var(--border);border-radius:14px;padding:16px;position:relative;overflow:hidden;transition:border-color .2s ease;backface-visibility:hidden;contain: paint;transform: translateZ(0);display:flex;flex-direction:column;gap:10px}
.platform h4{margin:0 0 6px}
.platform p{margin:0 0 12px;color:var(--muted);flex:1}
.btn.download-btn{background:rgba(255,255,255,.05)}
.btn.download-btn:hover{border-color:rgba(255,255,255,.18)}

/* Light sweep pseudo-element disabled */
.feature::before,.version-card::before,.platform::before{
  content:none;
}
/* Cyan outline on hover (lightweight: border + subtle outer glow) */
.feature:hover,
.version-card:hover,
.platform:hover{
  border-color:#00D4FF;
  box-shadow:0 0 0 2px rgba(0,212,255,.18);
}

/* Ensure tiles are positioning context for overlays */
.feature, .version-card, .platform{
  position: relative;
}

/* Target highlight state (applied via JS) */
.platform.highlighted, .version-card.highlighted, .feature.highlighted{
  animation: highlightOutline 0.6s ease-out 1;
  border-color: #00D4FF;
  box-shadow: 0 0 0 2px rgba(0,212,255,.25);
}

/* Cyan focus outlines for accessibility and clarity */
.feature:focus-visible,
.version-card:focus-visible,
.platform:focus-visible,
.btn:focus-visible,
nav a:focus-visible,
.tile:focus-visible{
  outline: 2px solid #00D4FF;
  outline-offset: 2px;
  border-color: #00D4FF;
  box-shadow: 0 0 0 3px rgba(0,212,255,.18);
}

/* CSS border-run removed; using JS SVG outline sweep to avoid artifacts */

/* Sparkles (created by JS) */
.sparkle{position:absolute;width:6px;height:6px;border-radius:50%;background:radial-gradient(circle, rgba(255,255,255,.9) 0%, rgba(0,212,255,.9) 60%, rgba(0,212,255,0) 70%);box-shadow:0 0 16px rgba(0,212,255,.6);opacity:.85;mix-blend-mode:screen;pointer-events:none;z-index:1}

/* Keyframes */
@keyframes floatBlob{
  0%{transform:translate3d(-2%, -1%, 0) scale(1); filter:blur(40px)}
  50%{transform:translate3d(2%, 1.5%, 0) scale(1.05); filter:blur(46px)}
  100%{transform:translate3d(-1%, 2%, 0) scale(1.02); filter:blur(42px)}
}
@keyframes panGrid{
  0%{background-position:0 0, 0 0}
  100%{background-position:64px 64px, 64px 64px}
}

@keyframes highlightOutline{
  0%{ outline-color: rgba(0,212,255,0); border-color: rgba(0,212,255,.4) }
  40%{ outline-color: rgba(0,212,255,.9); border-color: rgba(0,212,255,.9) }
  100%{ outline-color: rgba(0,212,255,0); border-color: rgba(0,212,255,.4) }
}

@keyframes spinBorder{
  to { transform: rotate(360deg); }
}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:28px 0;margin-top:56px;background:rgba(11,15,20,.72)}
.footer-inner{display:flex;align-items:center;justify-content:space-between}
.footer-inner .links a{margin-left:16px;color:var(--muted)}
.footer-inner .links a:hover{color:var(--text)}

/* Admin modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);backdrop-filter:saturate(120%) blur(2px);display:grid;place-items:center;z-index:100}
.modal-overlay[hidden]{display:none !important}
.modal-card{width:min(420px,92%);background:rgba(19,24,31,.98);border:1px solid var(--border);border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.4);padding:18px}
.modal-title{margin:0 0 10px 0}
.modal-label{display:block;margin:10px 0 6px;color:var(--muted)}
.modal-input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:#0f141a;color:var(--text)}
.modal-input:focus-visible{outline:2px solid #00D4FF;outline-offset:2px;border-color:#00D4FF}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:14px}
.modal-error{color:#ff6b6b;margin-top:10px}

/* Auth Overlay (multi-step gate) */
.auth-overlay{position:fixed;inset:0;z-index:120;background:rgba(0,0,0,.65);backdrop-filter:saturate(120%) blur(3px);display:grid;place-items:center;overflow:auto;-webkit-overflow-scrolling:touch}
.auth-overlay[hidden]{display:none !important}
.auth-card{width:min(520px,92%);background:rgba(19,24,31,.98);border:1px solid var(--border);border-radius:14px;box-shadow:0 24px 70px rgba(0,0,0,.5);padding:20px;position:relative;z-index:2;max-height:88vh;overflow:auto}
.auth-title{margin:0 0 8px}
.auth-subtitle{margin:8px 0 12px;color:var(--muted)}
.auth-form{display:grid;gap:8px;margin:10px 0 6px}
.auth-form label{color:var(--muted)}
.auth-form input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:#0f141a;color:var(--text)}
.auth-form input:focus-visible{outline:2px solid #00D4FF;outline-offset:2px;border-color:#00D4FF}
.auth-form .pw-wrap{position:relative}
.auth-form .pw-wrap > input{padding-right:44px}
.auth-form .pw-eye{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:none;color:var(--muted);cursor:pointer;border-radius:8px;
}
.auth-form .pw-eye:hover{color:var(--text);background:rgba(255,255,255,.06)}
.auth-form .pw-eye:focus-visible{outline:2px solid #00D4FF;outline-offset:2px}
.auth-form .pw-eye svg{width:20px;height:20px;fill:currentColor}
.auth-error{color:#ff6b6b;margin:6px 0 0}
.auth-divider{display:flex;align-items:center;gap:10px;margin:12px 0}
.auth-divider::before,.auth-divider::after{content:"";flex:1;height:1px;background:var(--border)}
.auth-divider span{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.4px}

/* Google sign-in button */
.google-btn{
  display:inline-flex;align-items:center;gap:10px;
  width:100%;
  background:#fff;
  color:#3c4043;
  border:1px solid #dadce0;
  border-radius:24px;
  padding:10px 14px;
  text-decoration:none;
  font-weight:600;
  transition:box-shadow .15s ease, transform .05s ease;
}
.google-btn:hover{box-shadow:0 1px 2px rgba(0,0,0,.15), 0 1px 3px rgba(0,0,0,.1)}
.google-btn:active{transform:translateY(1px)}
.google-btn:focus-visible{outline:2px solid #1a73e8; outline-offset:2px}
.google-btn .g-icon{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px}
.google-btn .g-icon svg{display:block}
.google-btn .g-label{flex:1;text-align:center;color:#3c4043}

/* Auth overlay visuals: basic glowing grid */
.auth-overlay::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background:
    repeating-linear-gradient(to right, rgba(0,212,255,.14) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(to bottom, rgba(0,212,255,.10) 0 1px, transparent 1px 28px);
  opacity:.6;
}
.auth-overlay::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:1;
  background:
    radial-gradient(60% 50% at 50% 40%, rgba(0,212,255,.08), rgba(0,212,255,0) 70%),
    radial-gradient(80% 60% at 50% 80%, rgba(106,92,255,.06), rgba(106,92,255,0) 75%);
  mix-blend-mode: screen;
  opacity:.7;
}

/* Responsive */
@media (max-width: 1024px){
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .showcase-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-media{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width: 640px){
  nav{display:none}
  .grid{grid-template-columns:1fr}
  .showcase-row{grid-template-columns:1fr}
  .hero-media{grid-template-columns:1fr}
  .version-grid{grid-template-columns:1fr}
  .platforms{grid-template-columns:1fr}
}